AT25640B_14 Datasheet, PDF (1/24 Pages) ATMEL Corporation – SPI Serial EEPROM

Atmel AT25320B and AT25640B
SPI Serial EEPROM
32Kb (4096 x 8) and 64Kb (8192 x 8)
Features
DATASHEET
 Serial Peripheral Interface (SPI) compatible
 Supports SPI Modes 0 (0,0) and 3 (1,1)
 Datasheet describes Mode 0 operation
 Low-voltage and standard-voltage operation
 1.8V (V_CC = 1.8V to 5.5V)
 20MHz clock rate (5V)
 32-byte Page mode
 Block Write Protection
 Protect 1/4, 1/2, or entire array
 Write Protect (WP) pin and Write Disable instructions for both hardware and
software data protection
 Self-timed write cycle (5ms max)
 High reliability
 Endurance: 1,000,000 write cycles
 Data retention: 100 years
 Green (Pb/Halide-free/RoHS compliant) packaging options
 Die sales: wafer form, tape and reel, and bumped wafers
Description
The Atmel^® AT25320B/640B provides 32768-/65536-bits of Serial Electrically-
erasable Programmable Read-Only Memory (EEPROM) organized as 4096/8192
words of eight bits each. The device is optimized for use in many industrial and
commercial applications where low-power and low-voltage operation are essential.
The AT25320B/640B is available in space-saving 8-lead JEDEC SOIC, 8-lead
TSSOP, 8-lead UDFN, 8-lead XDFN, and 8-ball VFBGA packages.
The AT25320B/640B is enabled through the Chip Select pin (CS) and accessed via a
3-wire interface consisting of Serial Data Input (SI), Serial Data Output (SO), and
Serial Clock (SCK). All programming cycles are completely self-timed, and no
separate erase cycle is required before Write.
8535G–SEEPROM–11/2012